dandle /ˈdandl 
/ ▸ verb [with object] move (a baby or young child) up and down in a playful or affectionate way: he dandled his son on his knee.
▪ move (something) lightly up and down: dandling the halter rope, he gently urged the pony's head up.
– ORIGIN mid 16th century: of unknown origin.
EnglishOxford Dictionary of English
